An introduction of injection wells washing methods(注水井洗井方法).pptxVIP

An introduction of injection wells washing methods 注水井洗井方法 ;Introduction Necessity Operation method Effection Conclusions Acknowledgment ;Improve the quality of water injection of oilfield, in relation to the ultimate recovery of oilfield, related to the sustainable development of oilfield effectively. Improve injection Wells washing quality is the important link to improve the quality of water injection, and ensure that oil field inject good water, inject enough water. We know, as the time of water injection prolonged, the cause of the injected water quality, some scale and impurity will adsorb on oil tubing and near wellbore area, causing pollution, decreased water absorption capacity, and the oil pressure rise, the water injection rate drop. And the conventional method to change this situation is to wash injection Wells. ;In recent years, as environmental protection requirements rise ceaselessly, washing well liquid of injection Wells are strictly prohibited to the emissions, injection well can only be washed by Airtight well-flushing device or Well washing vehicle, wash well liquid eventually return to oil and gas gathering transportation system recycling .Airtight well-flushing device and Well washing vehicle, due to the constraint of wash well’s conditions , well-washing time and wash well emissions are certain limits, so there will be part of the injection wells not reach well effect after washing. So how to explore and improve existing injection well washing method and well washing quality is a subject that we have to face in the existing conditions ;1.New Wells must be washed before turn into the water injection wells (water injection test) 2.Found unqualified water injection, to wash the well in time 3.Normal injection Wells in the same pressure, the injected water rate lower than test fall by more than 15%, for the wells which input packer of flush water, should be washed in the well. for th